Once Miracle Matter is defeated with this condition, the Dark Matter cloud surrounding Ripple Star will leave and explode. However, the completed Crystal will suddenly shoot a beam of light at the Fairy Queen, excising another force that appears to be more Dark Matter. The ball of Dark Matter will leave the atmosphere and expand in size exponentially, forming the mass of Dark Star. Kirby whips out his cell phone and dials a Warp Star to taxi him and his friends through space.

Upon entering the Dark Star, Kirby gets help from Adeleine, Waddle Dee, and King Dedede on his way towards 0². Waddle Dee opens up a path lower to Dark Star by bursting out of the ground, breaking one of the hexagonal platforms that amass Dark Star. Adeleine, as always, gives Kirby a Maxim Tomato if he needs health, or a 1UP if his health is full. King Dedede launches Kirby up into the battle with 0² via a seesaw-type mechanism, and the final battle commences.

Unlike other planets in the game, Dark Star has one level, as it is the secret final boss level. The only type of ground in the Dark Star are hexagonal tiled platforms with various colors (mostly red and yellow). The background is dark red with ribbons of Dark Matter energy, making it red and black.

The only enemies found in Dark Star are a bunch of N-Zs, which makes it a short level to get through with few problems.

After 0² is defeated, Dark Star explodes and seemingly nothing is left of it. Hyper Zone previously exploded in a similar fashion, but it did not stop Dark Matter from returning, so it cannot be made certain that either Dark Matter or any of Zero's incarnations are gone for good.